<script setup lang="ts">
import {computed} from "vue";

const props = defineProps({
  prefix: {type: String, default: "icon"},
  iconClass: {type: String, required: false, default: ""},
  color: {type: String},
  size: {type: String, default: "1em"}
});

const symbolId = computed(() => `#${props.prefix}-${props.iconClass}`);
const svgClass = computed(() => { props.iconClass ? `svg-icon ${props.iconClass}` : 'svg-icon' });
</script>

<template>
  <svg aria-hidden="true" :class="svgClass" :style="'width:' + size + ';height:' + size">
    <use :xlink:href="symbolId" :fill="color"/>
  </svg>
</template>

<style scoped>
.svg-icon {
  display: inline-block;
  outline: none;
  width: 1em;
  height: 1em;
  vertical-align: -0.15em; /* 因icon大小被设置为和字体大小一致，而span等标签的下边缘会和字体的基线对齐，故需设置一个往下的偏移比例，来纠正视觉上的未对齐效果 */
  fill: currentColor; /* 定义元素的颜色，currentColor是一个变量，这个变量的值就表示当前元素的color值，如果当前元素未设置color值，则从父元素继承 */
  overflow: hidden;
}
</style>